WO2022158585A1 - Terminal, procédé de communication sans fil et station de base - Google Patents

Terminal, procédé de communication sans fil et station de base Download PDF

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Publication number
WO2022158585A1
WO2022158585A1 PCT/JP2022/002333 JP2022002333W WO2022158585A1 WO 2022158585 A1 WO2022158585 A1 WO 2022158585A1 JP 2022002333 W JP2022002333 W JP 2022002333W WO 2022158585 A1 WO2022158585 A1 WO 2022158585A1
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WIPO (PCT)
Prior art keywords
cot
prach
transmission
configuration information
information
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PCT/JP2022/002333
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English (en)
Japanese (ja)
Inventor
慎也 熊谷
聡 永田
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株式会社Ｎｔｔドコモ
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Priority to US18/271,816 priority Critical patent/US20240057175A1/en
Publication of WO2022158585A1 publication Critical patent/WO2022158585A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access

Definitions

  • the present disclosure relates to terminals, wireless communication methods, and base stations in next-generation mobile communication systems.
  • LTE Long Term Evolution
  • 3GPP Rel. 10-14 LTE-Advanced (3GPP Rel. 10-14) has been specified for the purpose of further increasing the capacity and sophistication of LTE (Third Generation Partnership Project (3GPP) Release (Rel.) 8, 9).
  • LTE 5th generation mobile communication system
  • 5G+ 5th generation mobile communication system
  • NR New Radio
  • 3GPP Rel. 15 and later 5th generation mobile communication system
  • DCI Downlink Control Information
  • UE-initiated channel occupancy time for FBE (frame-based equipment) (COT)
  • COT frame-based equipment
  • one object of the present disclosure is to provide a terminal, a wireless communication method, and a base station that can appropriately control wireless communication in the NR-U system.
  • a terminal receives configuration information regarding channel occupancy time (COT) in a semi-static channel access procedure and configuration information regarding physical random access channel (PRACH) via higher layer signaling. and a control unit for controlling initiation of the COT based on configuration information on the COT and controlling PRACH transmission at PRACH transmission opportunities within the COT based on configuration information on the PRACH.
  • COT channel occupancy time
  • PRACH physical random access channel
  • wireless communication in the NR-U system can be appropriately controlled.
  • FIG. 16 shows an example of a base station-initiated COT in V.16.
  • FIG. FIG. 2 is a diagram illustrating an example of UE-initiated COT acquisition.
  • FIG. 3 is a diagram showing an example of PRACH transmission periods within the COT in the first embodiment.
  • FIG. 4 is a diagram showing an example of PRACH transmission periods within the COT in the second embodiment.
  • FIG. 5 is a diagram illustrating an example of a schematic configuration of a radio communication system according to an embodiment.
  • FIG. 6 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
  • FIG. 8 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
  • eMBB enhanced Mobile Broadband
  • mMTC massive Machine Type Communications
  • IoT Internet of Things
  • URLLC Ultra-Reliable and Low-Latency Communications
  • URLLC requires lower delay and higher reliability than eMBB.
  • Traffic types may be identified at the physical layer based on at least one of the following: Logical channels with different priorities Modulation and Coding Scheme (MCS) table (MCS index table) ⁇ Channel Quality Indication (CQI) table ⁇ DCI format ⁇ Used to scramble (mask) cyclic redundancy check (CRC) bits included in (added to) the relevant DCI (DCI format) (Radio Network Temporary Identifier (RNTI: System Information-Radio Network Temporary Identifier)) ⁇ RRC (Radio Resource Control) parameters ⁇ Specific RNTI (for example, RNTI for URLLC, MCS-C-RNTI, etc.) Search Spaces Predetermined fields in the DCI (e.g. newly added fields or re-use of existing fields)
  • MCS index table Modulation and Coding Scheme
  • CQI Channel Quality Indication
  • DCI format ⁇ Used to scramble (mask) cyclic redundancy check (CRC) bits included in (added to) the relevant DCI
  • the traffic type of HARQ-ACK (or PUCCH) for PDSCH may be determined based on at least one of the following.
  • An MCS index table e.g., MCS index table 3 whether to use - RNTI used for CRC scrambling of DCI used for scheduling of the PDSCH (for example, whether CRC scrambled with C-RNTI or MCS-C-RNTI) ⁇ Priority set by higher layer signaling
  • higher layer signaling may be, for example, Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling, broadcast information, or a combination thereof.
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • Broadcast information includes, for example, Master Information Block (MIB), System Information Block (SIB), Remaining Minimum System Information (RMSI), and other system information ( It may be Other System Information (OSI).
  • MIB Master Information Block
  • SIB System Information Block
  • RMSI Remaining Minimum System Information
  • OSI System Information
  • Physical layer signaling may be, for example, downlink control information (DCI).
  • DCI downlink control information
  • Traffic types may be associated with communication requirements (requirements such as delay and error rate), data types (voice, data, etc.).
  • the difference between URLLC requirements and eMBB requirements may be that the latency of URLLC is smaller than that of eMBB, or that URLLC requirements include reliability requirements.
  • eMBB user (U)-plane delay requirements may include a downlink U-plane delay of 4 ms and an uplink U-plane delay of 4 ms.
  • the URLLC U-plane delay requirements may include a downlink U-plane delay of 0.5 ms and an uplink U-plane delay of 0.5 ms.
  • URLLC reliability requirements may also include a 32-byte error rate of 10 ⁇ 5 at 1 ms U-plane delay.
  • traffic type service, service type, communication type, use case, etc.
  • communication control for example, transmission control at the time of collision, etc.
  • the priority may be set for signals (eg, UCI such as HARQ-ACK, reference signals, etc.), channels (PDSCH, PUSCH, etc.), HARQ-ACK codebooks, or the like.
  • Priority may be defined as a first priority (eg, High) and a second priority (eg, Low) that is lower in priority than the first priority.
  • a first priority eg, High
  • a second priority eg, Low
  • Information on priority may be signaled from the base station to the UE using at least one of higher layer signaling and DCI.
  • priority may be set for HARQ-ACK for dynamically scheduled PDSCH, HARQ-ACK for semi-persistent PDSCH (SPS PDSCH), and HARQ-ACK for SPS PDSCH release.
  • priority may be set for the HARQ-ACK codebooks corresponding to these HARQ-ACKs.
  • the priority of the PDSCH may be read as the priority of the HARQ-ACK for the PDSCH.
  • the UE may control UL transmission based on priority when different UL signals/UL channels collide. For example, control may be performed such that UL transmission with high priority is performed and UL transmission with low priority is not performed (for example, dropped). Alternatively, the transmission timing of lower priority UL transmissions may be changed (eg postponed or shifted).
  • a bit field for notifying priority in the DCI (for example, Priority indicator) is set is determined from the base station to the UE using higher layer signaling. May be notified or set. Further, if the UE does not include a bit field for notifying the priority in DCI, the priority of PDSCH (or HARQ-ACK corresponding to PDSCH) scheduled in the DCI is a specific priority (for example, low).
  • unlicensed band In unlicensed bands (eg, 2.4 GHz band, 5 GHz band, 6 GHz band, etc., may be called unlicensed spectrum), for example, Wi-Fi systems, systems that support Licensed-Assisted Access (LAA) (LAA system) coexist, it is considered that transmission collision avoidance and/or interference control among the plurality of systems will be required.
  • LAA Licensed-Assisted Access
  • LAA the data transmission device, before transmitting data in the unlicensed band, other devices (eg, base stations, user terminals, Wi-Fi devices, etc.) of Perform listening to check for transmission.
  • the listening includes Listen Before Talk (LBT), Clear Channel Assessment (CCA), carrier sense, channel sensing, sensing, channel access procedure, shared spectrum channel access procedure, energy It may be called detection (Energy Detection (ED)) or the like.
  • LBT Listen Before Talk
  • CCA Clear Channel Assessment
  • carrier sense channel sensing, sensing, channel access procedure, shared spectrum channel access procedure, energy It may be called detection (Energy Detection (ED)) or the like.
  • the transmitting device may be, for example, a base station (eg, gNodeB (gNB), may also be referred to as a network (NW)) in the downlink (DL) and a user terminal (UE) in the uplink (UL). good.
  • the receiving device that receives data from the transmitting device may be, for example, a user terminal in DL and a base station (NW) in UL.
  • the transmitting device is detected that there is no transmission of other devices in LBT (idle state) for a predetermined period (eg, immediately after or backoff period) after starting data transmission .
  • Future wireless communication systems for example, 5G, 5G+, New Radio (NR), 3GPP Rel. 15 and later are also considering the use of unlicensed bands.
  • An NR system using an unlicensed band may be called an NR-Unlicensed (U) system, an NR LAA system, or the like.
  • NR-U may also include dual connectivity (DC) between licensed and unlicensed bands, stand-alone (SA) for unlicensed bands, and the like.
  • DC dual connectivity
  • SA stand-alone
  • a node eg, base station, UE
  • the base station eg, gNB
  • the base station acquires a transmission opportunity (TxOP) and transmits when the LBT result is idle.
  • TxOP transmission opportunity
  • the base station or UE does not transmit if the LBT result is busy (LBT-busy).
  • the time of transmission opportunity may be referred to as the Channel Occupancy Time (COT).
  • COT Channel Occupancy Time
  • LBT-idle may be read as LBT success.
  • LBT-busy may be read as LBT failure.
  • FBE/LBE In future wireless communication systems (eg, NR after Rel.16), UE is under consideration to perform LBT based on multiple LBT types.
  • FBE frame-based equipment
  • LBE load-based equipment
  • FBE has a fixed frame period, performs sensing using a part of the resources, performs transmission if the channel is available, and does not transmit until the next sensing timing if the channel is unavailable.
  • NW and UE may perform LBT based on FBE.
  • FBE-based LBT may also be referred to as semistatic LBT, semi-static channel access operation, semi-static channel access mode, and so on.
  • LBE may indicate an LBT mechanism that extends the sensing period if the channel becomes unusable as a result of sensing, and continues sensing until the channel becomes available.
  • specific higher layer parameters eg, ChannelAccessMode-r16
  • NW and UE may perform LBT based on LBE.
  • LBT based on LBE may be called dynamic LBT.
  • LBE-based LBT may be distinguished by the type of LBT.
  • Such LBT types may be referred to as channel access types, channel access modes, shared channel access types, and the like.
  • channel access types may be classified into any of type 1, type 2A, type 2B, and type 2C.
  • channel access types are not limited to these.
  • the name of the channel access type for example, "channel access type X" X may be represented by arbitrary numbers, letters, or a combination of numbers and letters, or may be another name.
  • a type 1 channel access may be a channel access with variable transmission latency (Contention Window Size (CWS)) with random back-off.
  • Type 1 channel access may be a channel access type used in coexistence environments with other unlicensed bands (eg, Wi-fi).
  • terminals including terminals in other wireless communication standards/gNBs may perform sensing during a specific period of time prior to transmission of signals.
  • the specific period may consist of at least an extension period (which may be called Defer duration, eg, 43 ⁇ s) and a sensing slot (eg, 9 ⁇ s).
  • the counter may be decremented each time one sensing slot (eg, 9 ⁇ s) elapses.
  • the counter set in the terminal/gNB when the transmission of a signal by a terminal/gNB other than the terminal/gNB is detected (LBT busy), in a specific period (the period during which the signal is transmitted), You can stop.
  • the counter may be restarted after a certain period of time (the period during which the signal is transmitted).
  • the CWS of the terminals may be extended.
  • Type 2A channel access may be channel access without random backoff.
  • the UE is configured with a first period (for example, a period of 25 ⁇ s (a sensing period (interval), a gap, etc.)) including a period for sensing, and performs sensing in the period. may be performed.
  • a sensing period for example, a sensing period (interval), a gap, etc.
  • the UE may perform signal transmission immediately after the period has elapsed.
  • Type 2B channel access may be channel access without random backoff.
  • the UE may be configured with a second period (eg, a period of 16 ⁇ s) including a period for sensing, and may perform sensing during this period.
  • the UE may perform signal transmission immediately after the period has elapsed.
  • a period equal to or less than the first period or the second period (eg, 16 ⁇ s) is set for the UE, but it may be channel access in which sensing is not performed during this period.
  • the UE may transmit a signal in a predetermined period (for example, a maximum period of 584 ⁇ s) immediately after the period has elapsed.
  • a cyclic prefix (CP) extension may be configured to control the sensing period for each type of channel access.
  • a CP extension may be indicated at a particular time corresponding to the CP extension index. The specific time may be at least one of 25 ⁇ s, 16+T TA ⁇ s, 25+T TA ⁇ s, where T TA is the timing advance.
  • the UE may receive information regarding the indication of the channel access type and CP extension based on at least one of higher layer signaling and physical layer signaling.
  • base stations and UEs transmit and receive uplink (UL)/downlink (DL) signals/channels using gNB-initiated COT.
  • a base station-driven COT may be a COT obtained as a result of sensing performed by a certain base station (NW).
  • Base station initiated COT may also be referred to as base station initiated COT.
  • the base station initiated COT may be contained within a Fixed Frame Period (FFP).
  • FFP Fixed Frame Period
  • the FFP may be called Periodic Channel Occupancy (PCO), Semi-static Channel Occupancy (SCO).
  • PCO Periodic Channel Occupancy
  • SCO Semi-static Channel Occupancy
  • the start position of the FFP for every two consecutive radio frames may be aligned with the start position of a particular (eg, even-indexed) radio frame.
  • the duration of the FFP may be set/notified to the UE by higher layer signaling.
  • the higher layer signaling may be System Information Block 1 (SIB1) signaling/RRC signaling.
  • SIB1 System Information Block 1
  • RRC Radio Resource Control
  • the higher layer parameter configured/notified by the higher layer signaling may be SemiStaticChannelAccessConfig.
  • the period may be determined from, for example, 1ms, 2ms, 2.5ms, 4ms, 5ms, 10ms.
  • FIG. 1 shows Rel. 16 shows an example of a base station-initiated COT in V.16.
  • FIG. A base station (gNB) performs sensing in a specific period (for example, which may be called a sensing slot) immediately before the start of FFP.
  • the FFP may consist of a COT, a specific idle period during which no signal/channel is transmitted or received, and a period during which sensing is performed (which may be called a sensing slot).
  • the gNB will acquire COT (gNB-led COT).
  • the COT is included in the FFP (10 ms period here), and the start position of the COT is aligned with the start position of the FFP.
  • the start position of the FFP is aligned with the start position of each radio frame (here, frame #0 and frame #1).
  • the gNB transmits DL signals/channels and UL signals/channels on the acquired COT.
  • the gNB may first transmit the DL signal/channel. That is, in gNB-initiated COT, the UE may perform DL signal/channel reception first.
  • SCO semi-static channel occupancy
  • the UE-initiated FBE configuration may be performed for each serving cell.
  • the FFP for UE-initiated COT is configured separately from the FFP for gNB-initiated COT.
  • the value of FFP may be any value between 1 ms and 10 ms.
  • a UE in IDLE/INACTIVE mode can acquire a UE-initiated COT, that is, whether a UE can acquire a COT using a Physical Random Access Channel (PRACH) is being considered. not enough. Also, the operation when a UE in IDLE/INACTIVE mode acquires a COT using PRACH has not been sufficiently studied. The operation is described, for example, in Rel. Coexistence with UEs supporting NR-U in V.16, setting of PRACH/FFP is conceivable.
  • PRACH Physical Random Access Channel
  • a UE supporting NR-U in 16 may transmit PRACH in a period (RACH occurrence (RO)) for transmitting PRACH in base station initiated COT.
  • RACH occurrence (RO) PRACH occurrence
  • the configuration for FFP in base station-initiated COT and the configuration for PRACH in base station-initiated COT may be signaled/configured in higher layer signaling (eg, SIB1/RRC signaling).
  • the configuration for the PRACH may be a parameter for RACH configuration (eg, rach-ConfigCommon) included in the SIB for serving cell configuration (eg, ServingCellConfigCommonSIB).
  • a parameter for setting the channel access mode eg, channelAccessMode-r16
  • the SIB for serving cell configuration eg, ServingCellConfigCommonSIB
  • the channel access mode and RACH configuration may be associated with each other.
  • FIG. 2 is a diagram showing an example of UE-initiated COT acquisition.
  • the UE obtains a COT (UE initiated COT) in FFP#3.
  • the UE may be configured with an RO in the COT, perform PRACH transmission in the RO, and acquire the COT.
  • the inventors came up with a UE-driven COT/FFP configuration method when operating traffic types such as URLLC in the NR-U system.
  • A/B may be read as at least one of A and B, and "A/B/C” as at least one of A, B and C.
  • gNB-initiated COT may be referred to as first COT, semi-static COT in FBE, gNB-initiated COT, and so on.
  • FFP for gNB-initiated COT is FFP for first COT, FFP included in first COT, first FFP, FFP for semi-static COT in FBE , etc.
  • UE-initiated COT may be referred to as second COT, dynamic COT in FBE, UE-initiated COT, and so on.
  • FFP for UE-initiated COT includes FFP for second COT, FFP included in second COT, second FFP, FFP for dynamic COT in FBE, and so on.
  • UE obtaining COT means “UE-initiated COT obtaining", “UE-initiated COT obtaining”, “UE performing COT initiation (COT initiation) ", “UE initiates COT”, or the like.
  • a UE for which an RRC connection has not been completed a UE in IDLE mode, a UE in INACTIVE mode, and a UE in IDLE/INACTIVE mode may be read interchangeably, or may simply be referred to as UE.
  • the period for transmitting PRACH may be read as PRACH transmission period, PRACH transmission opportunity, transmission opportunity, RACH occasion, or the like.
  • starting COT using PRACH means starting COT using settings for PRACH, starting COT based on settings for PRACH, and transmitting PRACH in the started COT. , etc.
  • COT initiation may be performed using the PRACH settings defined in V.16 and earlier. That is, the UE may transmit the PRACH in the UE-initiated COT based on the PRACH-related settings in the base station-initiated COT.
  • COT initiation and PRACH transmission may be performed according to at least one of embodiments 1-1 and 1-2 below.
  • the UE may receive configuration (configuration information) regarding the FFP (second FFP) used for COT initiation through higher layer signaling.
  • the setting related to the FFP may be at least one of information related to the cycle (period) of the UE-initiated COT and information related to the UE-initiated start position (offset).
  • the higher layer signaling may be at least one of SIB1 and RRC signaling, for example.
  • the starting position and period (period) of the second FFP may be determined based on the first FFP.
  • the starting position and period of the second FFP in a specific period may be the same as the starting position and period of the first FFP in the specific period.
  • the UE may transmit and receive signals/channels on the COT contained in the second FFP with the same starting position and period as the first FFP.
  • information regarding the duration of the second FFP may be set/notified to the UE by higher layer parameters (eg, SemiStaticChannelAccessConfig) by higher layer signaling (SIB1 signaling/RRC signaling).
  • the period may be determined from, for example, 1 ms, 2 ms, 2.5 ms, 4 ms, 5 ms, and 10 ms, and may be expressed as an integer multiple of a specific period (eg, slot, sub-slot, symbol, sub-frame). may be expressed as any time.
  • the UE may receive information about the duration of the second FFP based on certain fields included in the DCI that schedules the transmission of the UL signal/channel in the second COT.
  • the DCI may be the DCI included in the first COT.
  • the UE may be notified/configured of a set (list) of information regarding the duration of the second FFP by higher layer signaling.
  • the UE selects the duration of the second FFP to apply to the second COT based on specific fields included in the DCI that schedules the transmission of UL signals/channels in the second COT from that set.
  • Information may be selected (determined).
  • the DCI may be the DCI included in the first COT.
  • the UE may perform COT start using the settings related to PRACH when the start position of the second FFP and the start position of the RACH occasion (RO) are aligned. Transmission of the PRACH is based on Rel. 16 may be followed.
  • the UE may receive the setting of whether to perform COT initiation through higher layer signaling.
  • the setting of whether or not to perform the COT start may be determined by the UE by setting a specific upper layer parameter to be enabled or disabled (not enable, disable) for the UE,
  • the UE may determine whether a specific higher layer parameter is set to enable for the UE.
  • the higher layer signaling may be at least one of SIB1 and RRC signaling, for example.
  • the UE when configured to perform COT initiation, may perform COT initiation using the configuration for PRACH. Transmission of the PRACH is based on Rel. 16 may be followed.
  • the UE may assume that the length of the UE-initiated COT is related to the RO in that COT. For example, the UE may assume that the length of the UE-initiated COT matches the RO in that COT. For example, the UE may assume that the COT ends when the PRACH transmission ends.
  • FIG. 3 is a diagram showing an example of the PRACH transmission period within the COT in the first embodiment.
  • FIG. 3 shows an example of the embodiment 1-1.
  • FFP for gNB-initiated COT (first FFP, FFP#1-1 to #1-3) and FFP for UE-initiated COT (second FFP, FFP #2-1 to #2-5) are set respectively.
  • the period of the first FFP is 10 ms and the period of the second FFP is 5 ms.
  • the start of the second FFP (FFP#2-1) starts after a certain offset from the start of the first FFP (FFP#1-1).
  • RO is set in the gNB-initiated COT.
  • the UE may assume that the RO start in gNB-initiated COT configuration and the RO start in UE-initiated COT configuration align.
  • the UE receives configuration information regarding FFP for UE-initiated COT from the gNB.
  • the UE acquires a COT in FFP#2-3 and transmits PRACH in RO within that COT.
  • Rel. PRACH transmission in UE-initiated COT compatible with 16 operational settings is enabled.
  • COT initiation may be performed using PRACH settings that differ from the settings for the PRACH defined prior to V.16. That is, the UE may receive information about PRACH in UE-initiated COT.
  • COT initiation and PRACH transmission may be performed according to at least one of embodiments 2-1 and 2-2 below.
  • the UE may receive the configuration (FFP configuration information) regarding the FFP (second FFP) used for COT initiation and the configuration regarding the PRACH for UE-initiated COT through higher layer signaling.
  • FFP configuration information regarding the FFP (second FFP) used for COT initiation
  • PRACH for UE-initiated COT
  • the setting related to the FFP may be at least one of information related to the cycle (period) of the UE-initiated COT and information related to the UE-initiated start position (offset). Also, the setting related to the PRACH is based on Rel. 16 may be different from the higher layer parameters for the configuration of PRACH in gNB-initiated COT specified up to 16. In other words, the UE may be notified of higher layer parameters for the PRACH configuration that are associated with the configuration regarding the second FFP that is configured for the UE. Also, the higher layer signaling may be at least one of SIB1 and RRC signaling, for example.
  • the UE may perform COT start using the settings related to PRACH when the start position of the second FFP and the start position of the RACH occasion (RO) are aligned. Transmission of the PRACH is based on Rel. 16 may be followed by the PRACH transmission method.
  • the UE may receive the setting of whether to perform COT initiation through higher layer signaling.
  • the setting of whether or not to perform the COT start may be determined by the UE by setting a specific upper layer parameter to be enabled or disabled (not enable, disable) for the UE,
  • the UE may determine whether a specific higher layer parameter is set to enable for the UE.
  • the higher layer signaling may be at least one of SIB1 and RRC signaling, for example.
  • the UE when configured to perform COT initiation, may perform COT initiation using the configuration for PRACH. Transmission of the PRACH is based on Rel. 16 may be followed by the PRACH transmission method.
  • the UE may assume that the length of the UE-initiated COT is related to the RO in that COT. For example, the UE may assume that the length of the UE-initiated COT matches the RO in that COT. For example, the UE may assume that the COT ends when the PRACH transmission ends.
  • FIG. 4 is a diagram showing an example of the PRACH transmission period within the COT in the second embodiment.
  • FIG. 4 shows an example of the embodiment 2-1.
  • FFP for gNB-initiated COT (first FFP, FFP#1-1 to #1-3) and FFP for UE-initiated COT (second FFP, FFP #2-1 to #2-6) are set respectively.
  • the period of the first FFP is 10 ms and the period of the second FFP is 5 ms.
  • the offset for the start of the second FFP (FFP#2-1) is set to 0 and coincides with the start of the first FFP (FFP#1-1).
  • RO is set in the gNB-initiated COT.
  • the UE may assume that the RO initiation in gNB-initiated COT configuration and the RO initiation in UE-initiated COT configuration do not coincide.
  • the UE receives configuration information about FFP for UE-initiated COT and configuration information about PRACH for UE-initiated COT from the gNB.
  • the UE acquires a COT in FFP#2-3 and transmits PRACH in RO within that COT.
  • the second embodiment it is possible to flexibly control PRACH transmission in UE-initiated COT.
  • a higher layer parameter (RRC information element)/UE capability corresponding to at least one function (feature) in the first and second embodiments may be defined.
  • UE capabilities may indicate support for this feature.
  • a UE for which a higher layer parameter corresponding to that function is set may perform that function. It may also be defined that "UEs for which upper layer parameters corresponding to the function are not set shall not perform the function".
  • a UE reporting UE capabilities indicating that it supports that function may perform that function. It may be specified that "a UE that does not report UE capabilities indicating that it supports the feature shall not perform that feature".
  • a UE may perform a function if it reports a UE capability indicating that it supports the function, and the higher layer parameters corresponding to the function are configured. "If the UE does not report the UE capability indicating that it supports the function, or if the higher layer parameters corresponding to the function are not set, the UE shall not perform the function" may be defined.
  • the function may be acquisition of UE-initiated COT using PRACH.
  • a feature may also be a basic feature of the UE in a specific scenario (eg, at least one of LAA, CA, DC, and SA).
  • a basic feature of the UE in a specific scenario may mean that the UE that supports the specific scenario must support the function.
  • the UE can implement the above functions while maintaining compatibility with existing specifications.
  • wireless communication system A configuration of a wireless communication system according to an embodiment of the present disclosure will be described below.
  • communication is performed using any one of the radio communication methods according to the above embodiments of the present disclosure or a combination thereof.
  • FIG. 5 is a diagram showing an example of a schematic configuration of a wireless communication system according to one embodiment.
  • the wireless communication system 1 may be a system that realizes communication using Long Term Evolution (LTE), 5th generation mobile communication system New Radio (5G NR), etc. specified by the Third Generation Partnership Project (3GPP). .
  • LTE Long Term Evolution
  • 5G NR 5th generation mobile communication system New Radio
  • 3GPP Third Generation Partnership Project
  • the wireless communication system 1 may also support dual connectivity between multiple Radio Access Technologies (RATs) (Multi-RAT Dual Connectivity (MR-DC)).
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • RATs Radio Access Technologies
  • MR-DC is dual connectivity between LTE (Evolved Universal Terrestrial Radio Access (E-UTRA)) and NR (E-UTRA-NR Dual Connectivity (EN-DC)), dual connectivity between NR and LTE (NR-E -UTRA Dual Connectivity (NE-DC)), etc.
  • LTE Evolved Universal Terrestrial Radio Access
  • EN-DC E-UTRA-NR Dual Connectivity
  • NE-DC NR-E -UTRA Dual Connectivity
  • the LTE (E-UTRA) base station (eNB) is the master node (MN), and the NR base station (gNB) is the secondary node (SN).
  • the NR base station (gNB) is the MN, and the LTE (E-UTRA) base station (eNB) is the SN.
  • the wireless communication system 1 has dual connectivity between multiple base stations within the same RAT (for example, dual connectivity (NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB) )) may be supported.
  • dual connectivity NR-NR Dual Connectivity (NN-DC) in which both MN and SN are NR base stations (gNB)
  • gNB NR base stations
  • a wireless communication system 1 includes a base station 11 forming a macrocell C1 with a relatively wide coverage, and base stations 12 (12a-12c) arranged in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. You may prepare.
  • a user terminal 20 may be located within at least one cell. The arrangement, number, etc. of each cell and user terminals 20 are not limited to the embodiment shown in the figure.
  • the base stations 11 and 12 are collectively referred to as the base station 10 when not distinguished.
  • the user terminal 20 may connect to at least one of the multiple base stations 10 .
  • the user terminal 20 may utilize at least one of carrier aggregation (CA) using a plurality of component carriers (CC) and dual connectivity (DC).
  • CA carrier aggregation
  • CC component carriers
  • DC dual connectivity
  • Each CC may be included in at least one of the first frequency band (Frequency Range 1 (FR1)) and the second frequency band (Frequency Range 2 (FR2)).
  • Macrocell C1 may be included in FR1, and small cell C2 may be included in FR2.
  • FR1 may be a frequency band below 6 GHz (sub-6 GHz)
  • FR2 may be a frequency band above 24 GHz (above-24 GHz). Note that the frequency bands and definitions of FR1 and FR2 are not limited to these, and for example, FR1 may correspond to a higher frequency band than FR2.
  • the user terminal 20 may communicate using at least one of Time Division Duplex (TDD) and Frequency Division Duplex (FDD) in each CC.
  • TDD Time Division Duplex
  • FDD Frequency Division Duplex
  • a plurality of base stations (eg, RRH) 10 may be connected by wire (eg, Common Public Radio Interface (CPRI) compliant optical fiber, X2 interface, etc.) or wirelessly (eg, NR communication).
  • CPRI Common Public Radio Interface
  • NR communication e.g, NR communication
  • the base station 11 corresponding to the upper station is an Integrated Access Backhaul (IAB) donor
  • the base station 12 corresponding to the relay station (relay) is an IAB Also called a node.
  • IAB Integrated Access Backhaul
  • the base station 10 may be connected to the core network 30 directly or via another base station 10 .
  • the core network 30 may include, for example, at least one of Evolved Packet Core (EPC), 5G Core Network (5GCN), Next Generation Core (NGC), and the like.
  • EPC Evolved Packet Core
  • 5GCN 5G Core Network
  • NGC Next Generation Core
  • the user terminal 20 may be a terminal compatible with at least one of communication schemes such as LTE, LTE-A, and 5G.
  • a radio access scheme based on orthogonal frequency division multiplexing may be used.
  • OFDM orthogonal frequency division multiplexing
  • CP-OFDM Cyclic Prefix OFDM
  • DFT-s-OFDM Discrete Fourier Transform Spread OFDM
  • OFDMA Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a radio access method may be called a waveform.
  • other radio access schemes for example, other single-carrier transmission schemes and other multi-carrier transmission schemes
  • the UL and DL radio access schemes may be used as the UL and DL radio access schemes.
  • a downlink shared channel Physical Downlink Shared Channel (PDSCH)
  • PDSCH Physical Downlink Shared Channel
  • PBCH Physical Broadcast Channel
  • PDCCH Physical Downlink Control Channel
  • an uplink shared channel (PUSCH) shared by each user terminal 20 an uplink control channel (Physical Uplink Control Channel (PUCCH)), a random access channel (Physical Random Access Channel (PRACH)) or the like may be used.
  • PUSCH uplink shared channel
  • PUCCH Physical Uplink Control Channel
  • PRACH Physical Random Access Channel
  • User data, upper layer control information, System Information Block (SIB), etc. are transmitted by the PDSCH.
  • User data, higher layer control information, and the like may be transmitted by PUSCH.
  • a Master Information Block (MIB) may be transmitted by the PBCH.
  • Lower layer control information may be transmitted by the PDCCH.
  • the lower layer control information may include, for example, downlink control information (DCI) including scheduling information for at least one of PDSCH and PUSCH.
  • DCI downlink control information
  • the DCI that schedules PDSCH may be called DL assignment, DL DCI, etc.
  • the DCI that schedules PUSCH may be called UL grant, UL DCI, etc.
  • PDSCH may be replaced with DL data
  • PUSCH may be replaced with UL data.
  • a control resource set (CControl Resource SET (CORESET)) and a search space (search space) may be used for PDCCH detection.
  • CORESET corresponds to a resource searching for DCI.
  • the search space corresponds to the search area and search method of PDCCH candidates.
  • a CORESET may be associated with one or more search spaces. The UE may monitor CORESETs associated with certain search spaces based on the search space settings.
  • One search space may correspond to PDCCH candidates corresponding to one or more aggregation levels.
  • One or more search spaces may be referred to as a search space set. Note that “search space”, “search space set”, “search space setting”, “search space set setting”, “CORESET”, “CORESET setting”, etc. in the present disclosure may be read interchangeably.
  • PUCCH channel state information
  • acknowledgment information for example, Hybrid Automatic Repeat reQuest ACKnowledgement (HARQ-ACK), ACK/NACK, etc.
  • SR scheduling request
  • a random access preamble for connection establishment with a cell may be transmitted by the PRACH.
  • downlink, uplink, etc. may be expressed without adding "link”.
  • various channels may be expressed without adding "Physical" to the head.
  • synchronization signals SS
  • downlink reference signals DL-RS
  • the DL-RS includes a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), a demodulation reference signal (DeModulation Reference Signal (DMRS)), Positioning Reference Signal (PRS)), Phase Tracking Reference Signal (PTRS)), etc.
  • CRS cell-specific reference signal
  • CSI-RS channel state information reference signal
  • DMRS Demodulation reference signal
  • PRS Positioning Reference Signal
  • PTRS Phase Tracking Reference Signal
  • the synchronization signal may be, for example, at least one of a Primary Synchronization Signal (PSS) and a Secondary Synchronization Signal (SSS).
  • PSS Primary Synchronization Signal
  • SSS Secondary Synchronization Signal
  • a signal block including SS (PSS, SSS) and PBCH (and DMRS for PBCH) may be called SS/PBCH block, SS Block (SSB), and so on.
  • SS, SSB, etc. may also be referred to as reference signals.
  • DMRS may also be called a user terminal-specific reference signal (UE-specific reference signal).
  • FIG. 6 is a diagram illustrating an example of the configuration of a base station according to one embodiment.
  • the base station 10 comprises a control section 110 , a transmission/reception section 120 , a transmission/reception antenna 130 and a transmission line interface 140 .
  • One or more of each of the control unit 110, the transmitting/receiving unit 120, the transmitting/receiving antenna 130, and the transmission line interface 140 may be provided.
  • this example mainly shows the functional blocks that characterize the present embodiment, and it may be assumed that the base station 10 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 110 controls the base station 10 as a whole.
  • the control unit 110 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
  • the control unit 110 may control signal generation, scheduling (eg, resource allocation, mapping), and the like.
  • the control unit 110 may control transmission/reception, measurement, etc. using the transmission/reception unit 120 , the transmission/reception antenna 130 and the transmission line interface 140 .
  • the control unit 110 may generate data to be transmitted as a signal, control information, a sequence, etc., and transfer them to the transmission/reception unit 120 .
  • the control unit 110 may perform call processing (setup, release, etc.) of communication channels, state management of the base station 10, management of radio resources, and the like.
  • the transmitting/receiving section 120 may include a baseband section 121 , a radio frequency (RF) section 122 and a measuring section 123 .
  • the baseband section 121 may include a transmission processing section 1211 and a reception processing section 1212 .
  • the transmitting/receiving unit 120 is configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure. be able to.
  • the transmission/reception unit 120 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
  • the transmission section may be composed of the transmission processing section 1211 and the RF section 122 .
  • the receiving section may be composed of a reception processing section 1212 , an RF section 122 and a measurement section 123 .
  • the transmitting/receiving antenna 130 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 120 may transmit the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 120 may receive the above-described uplink channel, uplink reference signal, and the like.
  • the transmitting/receiving unit 120 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 120 (transmission processing unit 1211) performs Packet Data Convergence Protocol (PDCP) layer processing, Radio Link Control (RLC) layer processing (for example, RLC retransmission control), Medium Access Control (MAC) layer processing (for example, HARQ retransmission control), etc. may be performed to generate a bit string to be transmitted.
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • HARQ retransmission control for example, HARQ retransmission control
  • the transmission/reception unit 120 (transmission processing unit 1211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, and discrete Fourier transform (DFT) on the bit string to be transmitted. Processing (if necessary), Inverse Fast Fourier Transform (IFFT) processing, precoding, transmission processing such as digital-to-analog conversion may be performed, and the baseband signal may be output.
  • channel coding which may include error correction coding
  • modulation modulation
  • mapping mapping
  • filtering filtering
  • DFT discrete Fourier transform
  • DFT discrete Fourier transform
  • the transmitting/receiving unit 120 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 130. .
  • the transmitting/receiving unit 120 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 130.
  • the transmission/reception unit 120 (reception processing unit 1212) performs analog-to-digital conversion, Fast Fourier transform (FFT) processing, and Inverse Discrete Fourier transform (IDFT) processing on the acquired baseband signal. )) processing (if necessary), filtering, demapping, demodulation, decoding (which may include error correction decoding), MAC layer processing, RLC layer processing and PDCP layer processing. User data and the like may be acquired.
  • FFT Fast Fourier transform
  • IDFT Inverse Discrete Fourier transform
  • the transmitting/receiving unit 120 may measure the received signal.
  • the measurement unit 123 may perform Radio Resource Management (RRM) measurement, Channel State Information (CSI) measurement, etc. based on the received signal.
  • the measurement unit 123 measures received power (for example, Reference Signal Received Power (RSRP)), reception quality (for example, Reference Signal Received Quality (RSRQ), Signal to Interference plus Noise Ratio (SINR), Signal to Noise Ratio (SNR)) , signal strength (for example, Received Signal Strength Indicator (RSSI)), channel information (for example, CSI), and the like may be measured.
  • RSRP Reference Signal Received Power
  • RSSQ Reference Signal Received Quality
  • SINR Signal to Noise Ratio
  • RSSI Received Signal Strength Indicator
  • channel information for example, CSI
  • the transmission path interface 140 transmits and receives signals (backhaul signaling) to and from devices included in the core network 30, other base stations 10, etc., and user data (user plane data) for the user terminal 20, control plane data, and the like. Data and the like may be obtained, transmitted, and the like.
  • the transmitter and receiver of the base station 10 in the present disclosure may be configured by at least one of the transmitter/receiver 120, the transmitter/receiver antenna 130, and the transmission path interface 140.
  • the transmitting/receiving unit 120 may transmit configuration information regarding the channel occupancy time (COT) in the semi-static channel access procedure and configuration information regarding the physical random access channel (PRACH) via higher layer signaling.
  • the control unit 110 may control reception of the PRACH transmitted based on the setting information on the PRACH in the PRACH transmission opportunity within the COT started based on the setting information on the COT (first, second embodiment).
  • FIG. 7 is a diagram illustrating an example of the configuration of a user terminal according to one embodiment.
  • the user terminal 20 includes a control section 210 , a transmission/reception section 220 and a transmission/reception antenna 230 .
  • One or more of each of the control unit 210, the transmitting/receiving unit 220, and the transmitting/receiving antenna 230 may be provided.
  • this example mainly shows the functional blocks of the features of the present embodiment, and it may be assumed that the user terminal 20 also has other functional blocks necessary for wireless communication. A part of the processing of each unit described below may be omitted.
  • the control unit 210 controls the user terminal 20 as a whole.
  • the control unit 210 can be configured from a controller, a control circuit, and the like, which are explained based on common recognition in the technical field according to the present disclosure.
  • the control unit 210 may control signal generation, mapping, and the like.
  • the control unit 210 may control transmission/reception, measurement, etc. using the transmission/reception unit 220 and the transmission/reception antenna 230 .
  • the control unit 210 may generate data, control information, sequences, etc. to be transmitted as signals, and transfer them to the transmission/reception unit 220 .
  • the transmitting/receiving section 220 may include a baseband section 221 , an RF section 222 and a measurement section 223 .
  • the baseband section 221 may include a transmission processing section 2211 and a reception processing section 2212 .
  • the transmitting/receiving unit 220 can be configured from a transmitter/receiver, an RF circuit, a baseband circuit, a filter, a phase shifter, a measurement circuit, a transmitting/receiving circuit, etc., which are explained based on common recognition in the technical field according to the present disclosure.
  • the transmission/reception unit 220 may be configured as an integrated transmission/reception unit, or may be configured from a transmission unit and a reception unit.
  • the transmission section may be composed of a transmission processing section 2211 and an RF section 222 .
  • the receiving section may include a reception processing section 2212 , an RF section 222 and a measurement section 223 .
  • the transmitting/receiving antenna 230 can be configured from an antenna described based on common recognition in the technical field related to the present disclosure, such as an array antenna.
  • the transmitting/receiving unit 220 may receive the above-described downlink channel, synchronization signal, downlink reference signal, and the like.
  • the transmitting/receiving unit 220 may transmit the above-described uplink channel, uplink reference signal, and the like.
  • the transmitter/receiver 220 may form at least one of the transmission beam and the reception beam using digital beamforming (eg, precoding), analog beamforming (eg, phase rotation), or the like.
  • digital beamforming eg, precoding
  • analog beamforming eg, phase rotation
  • the transmission/reception unit 220 (transmission processing unit 2211) performs PDCP layer processing, RLC layer processing (for example, RLC retransmission control), MAC layer processing (for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control), etc., to generate a bit string to be transmitted.
  • RLC layer processing for example, RLC retransmission control
  • MAC layer processing for example, for data and control information acquired from the control unit 210, for example , HARQ retransmission control
  • the transmitting/receiving unit 220 (transmission processing unit 2211) performs channel coding (which may include error correction coding), modulation, mapping, filtering, DFT processing (if necessary), and IFFT processing on a bit string to be transmitted. , precoding, digital-analog conversion, and other transmission processing may be performed, and the baseband signal may be output.
  • Transmitting/receiving unit 220 transmits the channel using the DFT-s-OFDM waveform when transform precoding is enabled for a certain channel (eg, PUSCH).
  • the DFT process may be performed as the transmission process, or otherwise the DFT process may not be performed as the transmission process.
  • the transmitting/receiving unit 220 may perform modulation to a radio frequency band, filter processing, amplification, and the like on the baseband signal, and may transmit the radio frequency band signal via the transmitting/receiving antenna 230. .
  • the transmitting/receiving section 220 may perform amplification, filtering, demodulation to a baseband signal, etc. on the radio frequency band signal received by the transmitting/receiving antenna 230.
  • the transmission/reception unit 220 (reception processing unit 2212) performs analog-to-digital conversion, FFT processing, IDFT processing (if necessary), filtering, demapping, demodulation, decoding (error correction) on the acquired baseband signal. decoding), MAC layer processing, RLC layer processing, PDCP layer processing, and other reception processing may be applied to acquire user data and the like.
  • the transmitting/receiving section 220 may measure the received signal.
  • the measurement unit 223 may perform RRM measurement, CSI measurement, etc. based on the received signal.
  • the measuring unit 223 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, SNR), signal strength (eg, RSSI), channel information (eg, CSI), and the like.
  • the measurement result may be output to control section 210 .
  • the transmitter and receiver of the user terminal 20 in the present disclosure may be configured by at least one of the transmitter/receiver 220 and the transmitter/receiver antenna 230 .
  • the transmitting/receiving unit 220 may receive configuration information regarding the channel occupancy time (COT) in the semi-static channel access procedure and configuration information regarding the physical random access channel (PRACH) via higher layer signaling.
  • the control unit 210 may control the start of the COT based on the configuration information about the COT, and may control PRACH transmission at PRACH transmission opportunities within the COT based on the configuration information about the PRACH (first and second embodiments).
  • the setting information about the COT may be at least one of information for notifying the start position and cycle of the COT and information for setting the start of the COT to be effective (first embodiment form).
  • the configuration information on the PRACH may be based on the information on the PRACH in the COT initiated by the base station (first and second embodiments).
  • the configuration information on the PRACH may be notified separately from the information on the PRACH in the COT initiated by the base station (first and second embodiments).
  • each functional block may be realized using one device physically or logically coupled, or directly or indirectly using two or more physically or logically separated devices (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices.
  • a functional block may be implemented by combining software in the one device or the plurality of devices.
  • function includes judgment, decision, determination, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, selection, establishment, comparison, assumption, expectation, deem , broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc.
  • a functional block (component) that performs transmission may be called a transmitting unit, a transmitter, or the like. In either case, as described above, the implementation method is not particularly limited.
  • a base station, a user terminal, etc. in an embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure.
  • FIG. 8 is a diagram illustrating an example of hardware configurations of a base station and a user terminal according to one embodiment.
  • the base station 10 and user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. .
  • the hardware configuration of the base station 10 and the user terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.
  • processor 1001 may be implemented by one or more chips.
  • predetermined software program
  • the processor 1001 performs calculations, communication via the communication device 1004 and at least one of reading and writing data in the memory 1002 and the storage 1003 .
  • the processor 1001 operates an operating system and controls the entire computer.
  • the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like.
  • CPU central processing unit
  • control unit 110 210
  • transmission/reception unit 120 220
  • FIG. 10 FIG. 10
  • the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the storage 1003 and the communication device 1004 to the memory 1002, and executes various processes according to them.
  • programs program codes
  • software modules software modules
  • data etc.
  • the control unit 110 (210) may be implemented by a control program stored in the memory 1002 and running on the processor 1001, and other functional blocks may be similarly implemented.
  • the memory 1002 is a computer-readable recording medium, such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically EPROM (EEPROM), Random Access Memory (RAM), or at least any other suitable storage medium. may be configured by one.
  • the memory 1002 may also be called a register, cache, main memory (main storage device), or the like.
  • the memory 1002 can store executable programs (program code), software modules, etc. for implementing a wireless communication method according to an embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also be called an auxiliary storage device.
  • a computer-readable recording medium for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (Compact Disc ROM (CD-ROM), etc.), a digital versatile disk, Blu-ray disc), removable disc, hard disk drive, smart card, flash memory device (e.g., card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium may be configured by Storage 1003 may also
  • the communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like.
  • the communication device 1004 includes a high-frequency switch, duplexer, filter, frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD), for example. may be configured to include
  • the transmitting/receiving unit 120 (220), the transmitting/receiving antenna 130 (230), and the like described above may be realized by the communication device 1004.
  • the transmitter/receiver 120 (220) may be physically or logically separated into a transmitter 120a (220a) and a receiver 120b (220b).
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that receives input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, a Light Emitting Diode (LED) lamp, etc.) that outputs to the outside. Note that the input device 1005 and the output device 1006 may be integrated (for example, a touch panel).
  • Each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
  • the bus 1007 may be configured using a single bus, or may be configured using different buses between devices.
  • the base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), a field programmable gate array (FPGA), etc. It may be configured including hardware, and a part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • PLD programmable logic device
  • FPGA field programmable gate array
  • a signal may also be a message.
  • a reference signal may be abbreviated as RS, and may also be called a pilot, a pilot signal, etc., depending on the applicable standard.
  • a component carrier may also be called a cell, a frequency carrier, a carrier frequency, or the like.
  • a radio frame may consist of one or more periods (frames) in the time domain.
  • Each of the one or more periods (frames) that make up a radio frame may be called a subframe.
  • a subframe may consist of one or more slots in the time domain.
  • a subframe may be a fixed time length (eg, 1 ms) independent of numerology.
  • a numerology may be a communication parameter applied to at least one of transmission and reception of a certain signal or channel.
  • Numerology for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration , a particular filtering process performed by the transceiver in the frequency domain, a particular windowing process performed by the transceiver in the time domain, and/or the like.
  • a slot may consist of one or more symbols (Orthogonal Frequency Division Multiplexing (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • a slot may also be a unit of time based on numerology.
  • a slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot.
  • a PDSCH (or PUSCH) transmitted in time units larger than a minislot may be referred to as PDSCH (PUSCH) Mapping Type A.
  • PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (PUSCH) mapping type B.
  • Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations. Note that time units such as frames, subframes, slots, minislots, and symbols in the present disclosure may be read interchangeably.
  • one subframe may be called a TTI
  • a plurality of consecutive subframes may be called a TTI
  • one slot or one minislot may be called a TTI. That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum scheduling time unit in wireless communication.
  • a base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each user terminal) to each user terminal on a TTI basis.
  • radio resources frequency bandwidth, transmission power, etc. that can be used by each user terminal
  • a TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.
  • one or more TTIs may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in 3GPP Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like.
  • a TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.
  • the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms
  • the short TTI e.g., shortened TTI, etc.
  • a TTI having the above TTI length may be read instead.
  • a resource block is a resource allocation unit in the time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain.
  • the number of subcarriers included in the RB may be the same regardless of the neumerology, eg twelve.
  • the number of subcarriers included in an RB may be determined based on neumerology.
  • an RB may contain one or more symbols in the time domain and may be 1 slot, 1 minislot, 1 subframe or 1 TTI long.
  • One TTI, one subframe, etc. may each be configured with one or more resource blocks.
  • One or more RBs are Physical Resource Block (PRB), Sub-Carrier Group (SCG), Resource Element Group (REG), PRB pair, RB Also called a pair.
  • PRB Physical Resource Block
  • SCG Sub-Carrier Group
  • REG Resource Element Group
  • PRB pair RB Also called a pair.
  • a resource block may be composed of one or more resource elements (Resource Element (RE)).
  • RE resource elements
  • 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.
  • a Bandwidth Part (which may also be called a bandwidth part) represents a subset of contiguous common resource blocks (RBs) for a numerology on a carrier.
  • the common RB may be identified by an RB index based on the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include UL BWP (BWP for UL) and DL BWP (BWP for DL).
  • BWP for UL
  • BWP for DL DL BWP
  • One or multiple BWPs may be configured for a UE within one carrier.
  • At least one of the configured BWPs may be active, and the UE may not expect to transmit or receive a given signal/channel outside the active BWP.
  • BWP bitmap
  • radio frames, subframes, slots, minislots, symbols, etc. described above are merely examples.
  • the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers and the number of symbols in a TTI, symbol length, cyclic prefix (CP) length, etc. can be varied.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, may be expressed using relative values from a predetermined value, or may be expressed using other corresponding information. may be represented. For example, radio resources may be indicated by a predetermined index.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. may refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of
  • information, signals, etc. can be output from a higher layer to a lower layer and/or from a lower layer to a higher layer.
  • Information, signals, etc. may be input and output through multiple network nodes.
  • Input/output information, signals, etc. may be stored in a specific location (for example, memory), or may be managed using a management table. Input and output information, signals, etc. may be overwritten, updated or appended. Output information, signals, etc. may be deleted. Input information, signals, etc. may be transmitted to other devices.
  • Uplink Control Information (UCI) Uplink Control Information
  • RRC Radio Resource Control
  • MIB Master Information Block
  • SIB System Information Block
  • SIB System Information Block
  • MAC Medium Access Control
  • the physical layer signaling may also be called Layer 1/Layer 2 (L1/L2) control information (L1/L2 control signal), L1 control information (L1 control signal), and the like.
  • RRC signaling may also be called an RRC message, and may be, for example, an RRC connection setup message, an RRC connection reconfiguration message, or the like.
  • MAC signaling may be notified using, for example, a MAC Control Element (CE).
  • CE MAC Control Element
  • notification of predetermined information is not limited to explicit notification, but implicit notification (for example, by not notifying the predetermined information or by providing another information by notice of
  • the determination may be made by a value (0 or 1) represented by 1 bit, or by a boolean value represented by true or false. , may be performed by numerical comparison (eg, comparison with a predetermined value).
  • Software whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • the software uses wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and/or wireless technology (infrared, microwave, etc.) , a server, or other remote source, these wired and/or wireless technologies are included within the definition of transmission media.
  • a “network” may refer to devices (eg, base stations) included in a network.
  • precoding "precoding weight”
  • QCL Quality of Co-Location
  • TCI state Transmission Configuration Indication state
  • spatialal patial relation
  • spatialal domain filter "transmission power”
  • phase rotation "antenna port
  • antenna port group "layer”
  • number of layers Terms such as “rank”, “resource”, “resource set”, “resource group”, “beam”, “beam width”, “beam angle”, “antenna”, “antenna element”, “panel” are interchangeable. can be used as intended.
  • base station BS
  • radio base station fixed station
  • NodeB NodeB
  • eNB eNodeB
  • gNB gNodeB
  • Access point "Transmission Point (TP)”, “Reception Point (RP)”, “Transmission/Reception Point (TRP)”, “Panel”
  • a base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.
  • a base station can accommodate one or more (eg, three) cells.
  • the overall coverage area of the base station can be partitioned into multiple smaller areas, and each smaller area is assigned to a base station subsystem (e.g., a small indoor base station (Remote Radio)). Head (RRH))) may also provide communication services.
  • a base station subsystem e.g., a small indoor base station (Remote Radio)). Head (RRH)
  • RRH Head
  • the terms "cell” or “sector” refer to part or all of the coverage area of at least one of the base stations and base station subsystems that serve communication within such coverage.
  • MS Mobile Station
  • UE User Equipment
  • Mobile stations include subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless terminals, remote terminals. , a handset, a user agent, a mobile client, a client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a wireless communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like.
  • the mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ).
  • at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations.
  • at least one of the base station and mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a user terminal.
  • communication between a base station and a user terminal is replaced with communication between multiple user terminals (for example, Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.)
  • the user terminal 20 may have the functions of the base station 10 described above.
  • words such as "up” and “down” may be replaced with words corresponding to inter-terminal communication (for example, "side”).
  • uplink channels, downlink channels, etc. may be read as side channels.
  • user terminals in the present disclosure may be read as base stations.
  • the base station 10 may have the functions of the user terminal 20 described above.
  • operations that are assumed to be performed by the base station may be performed by its upper node in some cases.
  • various operations performed for communication with a terminal may involve the base station, one or more network nodes other than the base station (e.g., Clearly, this can be done by a Mobility Management Entity (MME), Serving-Gateway (S-GW), etc. (but not limited to these) or a combination thereof.
  • MME Mobility Management Entity
  • S-GW Serving-Gateway
  • each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. Also, the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in the present disclosure may be rearranged as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • LTE-B LTE-Beyond
  • SUPER 3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • Future Radio Access FAA
  • New-Radio Access Technology RAT
  • New Radio NR
  • New radio access NX
  • Future generation radio access FX
  • GSM Global System for Mobile communications
  • CDMA2000 Code Division Multiple Access
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX (registered trademark)
  • IEEE 802.16 WiMAX (registered trademark)
  • UWB Ultra-WideBand
  • Bluetooth registered trademark
  • other appropriate wireless communication methods for example, a combination of LTE or LTE-A and 5G.
  • multiple systems may be applied in combination (for example, a combination of LTE or LTE-A and 5G).
  • any reference to elements using the "first,” “second,” etc. designations used in this disclosure does not generally limit the quantity or order of those elements. These designations may be used in this disclosure as a convenient method of distinguishing between two or more elements. Thus, references to first and second elements do not imply that only two elements may be employed or that the first element must precede the second element in any way.
  • determining includes judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiry ( For example, looking up in a table, database, or another data structure), ascertaining, etc. may be considered to be “determining.”
  • determining (deciding) includes receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access ( accessing (e.g., accessing data in memory), etc.
  • determining is considered to be “determining” resolving, selecting, choosing, establishing, comparing, etc. good too. That is, “determining (determining)” may be regarded as “determining (determining)” some action.
  • connection refers to any connection or coupling, direct or indirect, between two or more elements. and can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other. Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection” may be read as "access”.
  • radio frequency domain when two elements are connected, using one or more wires, cables, printed electrical connections, etc., and as some non-limiting and non-exhaustive examples, radio frequency domain, microwave They can be considered to be “connected” or “coupled” together using the domain, electromagnetic energy having wavelengths in the optical (both visible and invisible) domain, and the like.
  • a and B are different may mean “A and B are different from each other.”
  • the term may also mean that "A and B are different from C”.
  • Terms such as “separate,” “coupled,” etc. may also be interpreted in the same manner as “different.”

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un terminal selon un aspect de la présente divulgation est caractérisé en ce qu'il comprend : une unité de réception permettant de recevoir, par l'intermédiaire d'une signalisation de couche supérieure, des informations de configuration concernant un temps d'occupation de canal (COT) et des informations de configuration concernant un canal physique d'accès aléatoire (PRACH) dans une procédure d'accès au canal quasi-statique ; et une unité de commande permettant de commander le début du COT sur la base des informations de configuration concernant le COT et de commander la transmission du PRACH au niveau d'une opportunité de transmission de PRACH au sein du COT sur la base des informations de configuration concernant le PRACH. Selon un aspect de la présente divulgation, une communication sans fil dans un système NR-U peut être commandée de manière appropriée.
PCT/JP2022/002333 2021-01-25 2022-01-24 Terminal, procédé de communication sans fil et station de base WO2022158585A1 (fr)

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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
QUALCOMM INCORPORATED: "Uplink enhancements for URLLC in unlicensed controlled environments", 3GPP DRAFT; R1-2101461, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. e-Meeting; 20210125 - 20210205, 19 January 2021 (2021-01-19), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051971626 *

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